# NTSB WPR10LA191: Beech 58, N580TC, Santa Barbara, CA, March 22, 2010 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: March 21, 2010, 19:05 local (Mar 22, 2010, 02:05 UTC) - Place: Santa Barbara, CA - Coordinates: 34.426109, -119.841392 - Nearby events: https://openairdocs.org/map.md?lat=34.4261&lon=-119.8414&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Landing gear collapse](https://openairdocs.org/ntsb-events/094) - Highest injury: No injuries - Injuries: 4 uninjured - Status: Completed, report April 28, 2011 - Report: Approved by Office Director - NTSB office: Western Pacific Region - Parties: Federal Aviation Administration - NTSB case key (mKey): 75666 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR10LA191 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/75666/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=75666 - Page: https://openairdocs.org/ntsb/WPR10LA191 ## Probable cause The landing gear collapsing during the landing roll for undetermined reasons. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Not determined](https://openairdocs.org/ntsb-findings/05000000): Not determined › Not determined · Unknown/Not determined (probable cause); cases with it: [Beech 58P, 2 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md?model=1152744), [All aircraft, 2,247 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing-landing roll: Landing gear collapse](https://openairdocs.org/ntsb-events/094) (defining event); cases with it: [Beech 58P, 3 cases](https://openairdocs.org/ntsb-events/094/sequence.md?model=1152744), [All aircraft, 1,787 cases](https://openairdocs.org/ntsb-events/094/sequence.md) ## Analysis The pilot reported that on final approach he observed three green lights illuminated on the instrument panel, indicating to him that all three landing gear were down and locked. He noted that he did not hear a landing gear warning horn. After touching down and during the landing roll, the nose landing gear collapsed, followed by the right main landing gear and then the left main landing gear. The airplane came to rest slightly to the right of the runway's centerline with substantial damage to the forward bulkhead. A postaccident examination of the airplane by a certified Federal Aviation Administration airframe and powerplant mechanic failed to identify either a mechanical failure or malfunction that could have precipitated the landing gear collapse. The reason for the landing gear collapse was undetermined. ## Factual narrative On March 21, 2010, about 1905 Pacific daylight time, a Beech 58P, N580TC, sustained substantial damage following the collapse of all three landing gear during landing rollout at the Santa Barbara Municipal Airport (SBA), Santa Barbara, California. The airline transport pilot and his four passengers were not injured. Visual meteorological conditions prevailed at the time of the accident, and a flight plan was not filed. The cross-country flight, which was being operated in accordance with 14 Code of Federal Regulations Part 91, had departed the San Jose International Airport (SJC), San Jose, California, about 1745, with SBA as its destination. In a telephone interview with the NTSB investigator-in-charge (IIC) shortly after the accident occurred, the pilot reported that on final approach he observed "three green lights," which indicated that all three landing gear were down and locked; he added that he did not hear a landing gear warning horn either. The pilot further reported that upon touching down and after rolling out between 500 and 1,000 feet down the runway, the nose gear collapsed followed by the left and right main landing gear collapsing. The airplane came to rest on the runway and just off to the right of centerline. A Federal Aviation Administration (FAA) airworthiness inspector, who conducted a post accident examination of the airplane, reported that both main landing gear inner doors were damaged, but neither of the outer doors sustained any visible damage. The forward pressure bulkhead was substantially damaged. During a post accident examination and repair of the airplane, a certificated Federal Aviation Administration (FAA) airframe and powerplant mechanic reported that he did not identify a mechanical failure or malfunction that could be attributed to the landing gear collapse. ## Aircraft - Registration: [N580TC](https://openairdocs.org/deregistered/N580TC-2012-09-17), registration cancelled 2012-09-17, S/N TJ-126, built 1977 (OpenAirDocs) - Reported make and model: BEECH 58 (P) - Registry model: [Beech 58P](https://openairdocs.org/model/beech-58p) (registry code 1152744) (OpenAirDocs) - Registry engine: [Continental TSIO-520 series](https://openairdocs.org/engine/continental-tsio-520-series) (registry code 17040, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: TJ-126 - Airframe hours: 5680 - Engines: Continental TSIO 520 325 horsepower reciprocating; Continental TSIO 520 325 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Terence R Cunningham - Registered owner: Terence R Cunningham - Airworthiness certificate: Standard, Normal - Last inspection: Annual, April 1, 2009, 80 hours before - Departed: SJC, San Jose, CA - Destination: SBA, Santa Barbara, CA - Airport: SBA, Santa Barbara Municipal Airpor, runway 25, 6,052 × 150 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 50; injuries: none; airline transport; airplane ratings: multi-engine land; instrument ratings: airplane; medical: class 2, with waivers/limitations; last flight review February 28, 2010; seat: left; flight hours: 3,540 total, 170 in this make and model, 3,380 as pilot in command, 19 in the last 90 days, 7 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 57 °F, dew point 52 °F - Altimeter: 30.05 inHg - Observed at: SBA ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Accident 20100321031089A](https://openairdocs.org/incident/20100321031089A), Mar 21, 2010: Beech 58P, Santa Barbara, CA, Substantial damage. The [privacy data omitted] stated he had three green landing gear lights at touchdown at about 100 KTS. Almost immediately after touchdown he believes the nose… ## Other investigations on N580TC (1) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB WPR12LA097](https://openairdocs.org/ntsb/WPR12LA097), Jan 8, 2012: Beech 58P (N580TC), Santa Ana, CA, substantial damage. Probable cause: The pilot’s failure to review or execute any applicable checklist procedures or troubleshoot or take corrective action before landing despite indications that the landing gear was not extended.… ## Docket (4 files) The files NTSB released with the investigation on January 27, 2011, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=75666. 3.9 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 3.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40342459&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF - Record of Conversation - Pilot (item 2, .PDF, 56 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40342536&FileExtension=.PDF&FileName=Record%20of%20Conversation%20-%20Pilot-Master.PDF - Record of Conversation - Aircraftsman, Inc. (item 3, .PDF, 53 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40342463&FileExtension=.PDF&FileName=Record%20of%20Conversation%20-%20Aircraftsman,%20Inc.-Master.PDF - Release of Aircraft Wreckage, NTSB Form 6120.15 (item 4, .PDF, 19 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40342464&FileExtension=.PDF&FileName=Release%20of%20Aircraft%20Wreckage,%20NTSB%20Form%206120.15-Redacted.PDF From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.